The first company I started the research on a Japanese Company by the name of Nintendo, this company has been developing games and creating consoles since 1974. Nintendo has developed consoles such as the Color TV which was a Japan only system at the time and the NES, their also made over systems like the SNES (Super Nintendo Entertainment System), Nintendo 64, Gamecube, Wii and most recent Wii U.
Nintendo is also a company that actually developers thier own games for their own systems, one example is the most famous character in the history of gaming, Mario. Nintendo's Shigeru Miyamoto created Mario for a video game called Donkey Kong, though at the time Mario wasn't called Mario, his actual name was Jump Man but Nintendo later changed his name to Mario to suit audiences outside of Japan. Mario is an Italian plumber who wears red and blue clothes with white gloves and goes on adventures to save a princess named Peach who was kidnaped by a Dragon-Dinosaur creature known as Bowser (King Koopa in Japan).
Mario-
As you can see he is very cartoony in apperence which is very appealing for kids and children of a young age. The attitude of the character is a happy and friendly character which children can respond in a postive way to, also most of his games are set around cheery scene but his games sometimes has dark scenes but Nintendo still manages to create a cartoony atmosphere.
Princess Peach-
Princess Peach is a more female-friend character, she is basically your typical Princess in trouble kind of Princess which the player and Mario must save her from Bowser. She is cheery much like Mario but does fall into the catergory of "Help me please" kind of girls which can come across as stereotyping.
Bowser (King Koopa)-
Bowser or King Koopa (Depending which country you are from) is the main villian of the Mario games series. His appearence is menacing with his spikes and horns, this is so that the people playing the game are able to tell which character is the villian and which one is the hero. Nintendo went for a sort of dinosaur/dragon idea which is why they have a princess, the games are pretty much like a fairy tale story about a Prince saving a Princess from an evil dragon but this time the Prince is actually a plumber.